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110 lines
3.9 KiB
C++
110 lines
3.9 KiB
C++
/* qeventloopinteractor.cpp
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Copyright (C) 2003 Klarälvdalens Datakonsult AB
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This file is part of QGPGME.
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QGPGME is free software; you can redistribute it and/or modify it
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under the terms of the GNU Library General Public License as published
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by the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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QGPGME is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with QGPGME; see the file COPYING.LIB. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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// -*- c++ -*-
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#include <qgpgme/eventloopinteractor.h>
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#include <gpgme++/global.h>
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#include <QIODevice>
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#include <QSignalMapper>
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Q_GLOBAL_STATIC( QSignalMapper, readSignalMapper )
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Q_GLOBAL_STATIC( QSignalMapper, writeSignalMapper )
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static QSignalMapper * setupReadSignalMapper( QObject * o ) {
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QSignalMapper * sm = readSignalMapper();
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o->connect( sm, SIGNAL(mapped(int)), SLOT(slotReadActivity(int)) );
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return sm;
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}
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static QSignalMapper * setupWriteSignalMapper( QObject * o ) {
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QSignalMapper * sm = writeSignalMapper();
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o->connect( sm, SIGNAL(mapped(int)), SLOT(slotWriteActivity(int)) );
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return sm;
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}
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namespace {
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struct IO {
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QIODevice * device;
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QGpgME::EventLoopInteractor::Direction direction;
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};
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}
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void * QGpgME::EventLoopInteractor::registerWatcher( int fd, Direction dir, bool & ok ) {
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QIODevice * const iod = GpgME::getQIODevice( fd );
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if ( !iod ) {
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ok = false;
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return 0;
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}
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if ( dir == Read ) {
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static QSignalMapper * rsm = setupReadSignalMapper( this );
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if ( !rsm->mapping( fd ) ) {
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rsm->setMapping( iod, fd );
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connect( iod, SIGNAL(readyRead()), rsm, SLOT(map()) );
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} else {
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// if this fd is already registered, gpgme registers an additional
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// callback for the same fd.
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// if there is already something to read when registering the new
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// callback, gpgme expects the new callback to be called, so we
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// trigger it"
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QMetaObject::invokeMethod( this, "slotReadActivity", Qt::QueuedConnection, Q_ARG( int, fd ) );
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}
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} else {
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static QSignalMapper * wsm = setupWriteSignalMapper( this );
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if ( !wsm->mapping( fd ) ) {
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wsm->setMapping( iod, fd );
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connect( iod, SIGNAL(bytesWritten(qint64)), wsm, SLOT(map()) );
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} else {
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// if this fd is already registered, gpgme registers an additional
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// callback for the same fd.
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// if the device is writable when registering the new
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// callback, gpgme expects the new callback to be called, so we
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// trigger it:
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QMetaObject::invokeMethod( this, "slotWriteActivity", Qt::QueuedConnection, Q_ARG( int, fd ) );
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}
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}
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ok = true;
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IO * const io = new IO;
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io->device = iod;
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io->direction = dir;
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iod->bytesAvailable(); //HACK: tell KDPipeIODevices to start their threads
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iod->bytesToWrite();
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return io;
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}
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void QGpgME::EventLoopInteractor::unregisterWatcher( void * tag ) {
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if ( !tag ) {
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return;
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}
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const IO * const io = static_cast<IO*>( tag );
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if ( io->direction == Read ) {
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// no setupReadSignalMapper here, since registerWatcher,
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// called before us, is guaranteed to have set it up
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static QSignalMapper * rsm = readSignalMapper();
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disconnect( io->device, SIGNAL(readyRead()), rsm, SLOT(map()) );
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} else {
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static QSignalMapper * wsm = writeSignalMapper();
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disconnect( io->device, SIGNAL(bytesWritten(qint64)), wsm, SLOT(map()) );
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}
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delete io;
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}
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